overlap: The following is the only relevant hit I found with a Google search on ["overlap" CD] (I didn't follow all the links).

Note: Sounds like:

Sometime I (somebody) should do a search on "stitching" CD.

Overlap sound like it has something to do with reading more of the CD than you absolutely need at this moment to compensate for times when the reader is, for example, between tracks and is not reading any data.

If stitching is required by the CD drive, you must read overlapping data from the drive. For instance, if one read you get 75 blocks starting at address 01:15:50 (one minute, 15 seconds, 50 blocks), the next read should overlap by some amount. I have found that an overlap of 7 blocks gives good results. Thus the next read would read 75 blocks starting at address 01:16:43 (7 blocks shy of a full second). You need to pass the StitchAudioIntoRing the number of frames of overlap that you're using.